./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_7+soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f460772fead60a1176aea731764c3b630060c5177c926c9899f5df040e824856 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:19:04,190 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:19:04,300 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:19:04,309 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:19:04,310 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:19:04,345 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:19:04,346 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:19:04,347 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:19:04,347 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:19:04,347 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:19:04,348 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:19:04,348 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:19:04,348 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:19:04,348 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:19:04,349 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:19:04,349 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:19:04,349 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:19:04,349 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:19:04,349 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:19:04,349 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:19:04,349 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:19:04,350 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:19:04,350 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:19:04,350 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:19:04,350 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:19:04,350 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:19:04,350 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:19:04,350 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:19:04,350 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:19:04,351 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:19:04,351 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:19:04,351 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:19:04,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:19:04,352 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:19:04,353 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:19:04,353 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:19:04,353 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:19:04,353 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:19:04,353 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:19:04,353 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:19:04,353 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:19:04,353 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:19:04,354 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:19:04,354 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:19:04,354 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:19:04,354 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:19:04,354 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:19:04,354 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:19:04,354 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f460772fead60a1176aea731764c3b630060c5177c926c9899f5df040e824856 [2024-11-28 04:19:04,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:19:04,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:19:04,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:19:04,767 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:19:04,767 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:19:04,770 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/combinations/square_7+soft_float_1-2a.c.cil.c [2024-11-28 04:19:08,204 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/data/1d2c50d0e/ade2cb837f0b4780a5994639f600171c/FLAG8ef31fa5f [2024-11-28 04:19:08,507 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:19:08,508 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/sv-benchmarks/c/combinations/square_7+soft_float_1-2a.c.cil.c [2024-11-28 04:19:08,531 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/data/1d2c50d0e/ade2cb837f0b4780a5994639f600171c/FLAG8ef31fa5f [2024-11-28 04:19:08,562 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/data/1d2c50d0e/ade2cb837f0b4780a5994639f600171c [2024-11-28 04:19:08,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:19:08,569 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:19:08,572 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:19:08,572 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:19:08,579 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:19:08,581 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:19:08" (1/1) ... [2024-11-28 04:19:08,585 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43b89eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:08, skipping insertion in model container [2024-11-28 04:19:08,586 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:19:08" (1/1) ... [2024-11-28 04:19:08,629 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:19:08,870 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/sv-benchmarks/c/combinations/square_7+soft_float_1-2a.c.cil.c[1995,2008] [2024-11-28 04:19:08,880 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/sv-benchmarks/c/combinations/square_7+soft_float_1-2a.c.cil.c[2389,2402] [2024-11-28 04:19:08,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:19:08,986 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:19:09,002 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/sv-benchmarks/c/combinations/square_7+soft_float_1-2a.c.cil.c[1995,2008] [2024-11-28 04:19:09,004 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/sv-benchmarks/c/combinations/square_7+soft_float_1-2a.c.cil.c[2389,2402] [2024-11-28 04:19:09,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:19:09,063 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:19:09,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:09 WrapperNode [2024-11-28 04:19:09,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:19:09,065 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:19:09,065 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:19:09,065 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:19:09,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:09" (1/1) ... [2024-11-28 04:19:09,088 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:09" (1/1) ... [2024-11-28 04:19:09,139 INFO L138 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 211 [2024-11-28 04:19:09,139 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:19:09,140 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:19:09,140 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:19:09,140 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:19:09,153 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:09" (1/1) ... [2024-11-28 04:19:09,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:09" (1/1) ... [2024-11-28 04:19:09,161 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:09" (1/1) ... [2024-11-28 04:19:09,189 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 04:19:09,193 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:09" (1/1) ... [2024-11-28 04:19:09,193 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:09" (1/1) ... [2024-11-28 04:19:09,207 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:09" (1/1) ... [2024-11-28 04:19:09,209 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:09" (1/1) ... [2024-11-28 04:19:09,217 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:09" (1/1) ... [2024-11-28 04:19:09,223 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:09" (1/1) ... [2024-11-28 04:19:09,224 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:09" (1/1) ... [2024-11-28 04:19:09,227 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:19:09,228 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:19:09,229 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:19:09,229 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:19:09,230 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:09" (1/1) ... [2024-11-28 04:19:09,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:19:09,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:19:09,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:19:09,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:19:09,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:19:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-28 04:19:09,317 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-28 04:19:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:19:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:19:09,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:19:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 04:19:09,317 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 04:19:09,431 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:19:09,434 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:19:10,050 INFO L? ?]: Removed 81 outVars from TransFormulas that were not future-live. [2024-11-28 04:19:10,051 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:19:10,066 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:19:10,066 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 04:19:10,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:19:10 BoogieIcfgContainer [2024-11-28 04:19:10,067 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:19:10,070 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:19:10,070 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:19:10,076 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:19:10,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:19:08" (1/3) ... [2024-11-28 04:19:10,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d969a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:19:10, skipping insertion in model container [2024-11-28 04:19:10,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:09" (2/3) ... [2024-11-28 04:19:10,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d969a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:19:10, skipping insertion in model container [2024-11-28 04:19:10,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:19:10" (3/3) ... [2024-11-28 04:19:10,079 INFO L128 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_1-2a.c.cil.c [2024-11-28 04:19:10,099 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:19:10,101 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_7+soft_float_1-2a.c.cil.c that has 3 procedures, 103 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-28 04:19:10,181 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:19:10,195 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@41561c51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:19:10,196 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-28 04:19:10,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 90 states have (on average 1.5888888888888888) internal successors, (143), 94 states have internal predecessors, (143), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 04:19:10,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 04:19:10,207 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:19:10,207 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:19:10,208 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:19:10,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:19:10,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1530844763, now seen corresponding path program 1 times [2024-11-28 04:19:10,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:19:10,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579174615] [2024-11-28 04:19:10,225 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:19:10,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:19:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:19:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:19:10,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:19:10,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579174615] [2024-11-28 04:19:10,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579174615] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:19:10,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:19:10,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:19:10,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997742223] [2024-11-28 04:19:10,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:19:10,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:19:10,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:19:10,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:19:10,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:19:10,436 INFO L87 Difference]: Start difference. First operand has 103 states, 90 states have (on average 1.5888888888888888) internal successors, (143), 94 states have internal predecessors, (143), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:19:10,478 INFO L93 Difference]: Finished difference Result 201 states and 318 transitions. [2024-11-28 04:19:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:19:10,479 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-28 04:19:10,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:19:10,489 INFO L225 Difference]: With dead ends: 201 [2024-11-28 04:19:10,489 INFO L226 Difference]: Without dead ends: 96 [2024-11-28 04:19:10,492 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:19:10,495 INFO L435 NwaCegarLoop]: 149 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:19:10,496 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:19:10,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-28 04:19:10,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-28 04:19:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.4880952380952381) internal successors, (125), 87 states have internal predecessors, (125), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 04:19:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 140 transitions. [2024-11-28 04:19:10,541 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 140 transitions. Word has length 7 [2024-11-28 04:19:10,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:19:10,541 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 140 transitions. [2024-11-28 04:19:10,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:10,542 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 140 transitions. [2024-11-28 04:19:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 04:19:10,542 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:19:10,542 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:19:10,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:19:10,543 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:19:10,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:19:10,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1530904345, now seen corresponding path program 1 times [2024-11-28 04:19:10,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:19:10,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887710954] [2024-11-28 04:19:10,544 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:19:10,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:19:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 04:19:10,561 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 04:19:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 04:19:10,595 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 04:19:10,595 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 04:19:10,597 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-11-28 04:19:10,599 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-28 04:19:10,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:19:10,607 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-28 04:19:10,621 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 04:19:10,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:19:10 BoogieIcfgContainer [2024-11-28 04:19:10,625 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 04:19:10,626 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 04:19:10,626 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 04:19:10,627 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 04:19:10,628 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:19:10" (3/4) ... [2024-11-28 04:19:10,631 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-11-28 04:19:10,632 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 04:19:10,633 INFO L158 Benchmark]: Toolchain (without parser) took 2064.32ms. Allocated memory is still 117.4MB. Free memory was 92.4MB in the beginning and 79.7MB in the end (delta: 12.6MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2024-11-28 04:19:10,633 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 117.4MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:19:10,634 INFO L158 Benchmark]: CACSL2BoogieTranslator took 492.17ms. Allocated memory is still 117.4MB. Free memory was 92.2MB in the beginning and 76.9MB in the end (delta: 15.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 04:19:10,634 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.50ms. Allocated memory is still 117.4MB. Free memory was 76.9MB in the beginning and 75.1MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:19:10,637 INFO L158 Benchmark]: Boogie Preprocessor took 87.68ms. Allocated memory is still 117.4MB. Free memory was 75.1MB in the beginning and 72.9MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:19:10,638 INFO L158 Benchmark]: RCFGBuilder took 838.74ms. Allocated memory is still 117.4MB. Free memory was 72.9MB in the beginning and 49.4MB in the end (delta: 23.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-28 04:19:10,639 INFO L158 Benchmark]: TraceAbstraction took 555.72ms. Allocated memory is still 117.4MB. Free memory was 48.8MB in the beginning and 80.3MB in the end (delta: -31.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:19:10,639 INFO L158 Benchmark]: Witness Printer took 5.52ms. Allocated memory is still 117.4MB. Free memory was 80.3MB in the beginning and 79.7MB in the end (delta: 549.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:19:10,645 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 117.4MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 492.17ms. Allocated memory is still 117.4MB. Free memory was 92.2MB in the beginning and 76.9MB in the end (delta: 15.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 74.50ms. Allocated memory is still 117.4MB. Free memory was 76.9MB in the beginning and 75.1MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 87.68ms. Allocated memory is still 117.4MB. Free memory was 75.1MB in the beginning and 72.9MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 838.74ms. Allocated memory is still 117.4MB. Free memory was 72.9MB in the beginning and 49.4MB in the end (delta: 23.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 555.72ms. Allocated memory is still 117.4MB. Free memory was 48.8MB in the beginning and 80.3MB in the end (delta: -31.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.52ms. Allocated memory is still 117.4MB. Free memory was 80.3MB in the beginning and 79.7MB in the end (delta: 549.4kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryFLOATComparisonOperation at line 40, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L403] COND TRUE __VERIFIER_nondet_int() [L404] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L47] COND TRUE !(result >= 0.0f && result < 1.4f) [L48] reach_error() - UnprovableResult [Line: 61]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 103 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 149 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 149 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-28 04:19:10,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f460772fead60a1176aea731764c3b630060c5177c926c9899f5df040e824856 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:19:13,930 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:19:14,095 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-28 04:19:14,106 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:19:14,107 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:19:14,159 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:19:14,160 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:19:14,160 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:19:14,162 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:19:14,163 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:19:14,163 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:19:14,163 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:19:14,164 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:19:14,165 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:19:14,165 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:19:14,166 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:19:14,166 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:19:14,166 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:19:14,166 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:19:14,166 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:19:14,166 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:19:14,166 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:19:14,166 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:19:14,166 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:19:14,166 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 04:19:14,167 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 04:19:14,167 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:19:14,167 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:19:14,167 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:19:14,167 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:19:14,167 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:19:14,167 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:19:14,167 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:19:14,167 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:19:14,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:19:14,168 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:19:14,168 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:19:14,168 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:19:14,168 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:19:14,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:19:14,170 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:19:14,170 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:19:14,170 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:19:14,171 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:19:14,171 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 04:19:14,171 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 04:19:14,172 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:19:14,172 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:19:14,172 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:19:14,172 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:19:14,172 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f460772fead60a1176aea731764c3b630060c5177c926c9899f5df040e824856 [2024-11-28 04:19:14,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:19:14,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:19:14,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:19:14,661 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:19:14,662 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:19:14,663 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/combinations/square_7+soft_float_1-2a.c.cil.c [2024-11-28 04:19:18,119 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/data/6872c0f24/299296433c4c4e9e9418c33fd72c9035/FLAG7e134a41e [2024-11-28 04:19:18,456 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:19:18,457 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/sv-benchmarks/c/combinations/square_7+soft_float_1-2a.c.cil.c [2024-11-28 04:19:18,469 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/data/6872c0f24/299296433c4c4e9e9418c33fd72c9035/FLAG7e134a41e [2024-11-28 04:19:18,693 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/data/6872c0f24/299296433c4c4e9e9418c33fd72c9035 [2024-11-28 04:19:18,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:19:18,697 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:19:18,699 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:19:18,699 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:19:18,705 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:19:18,706 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:19:18" (1/1) ... [2024-11-28 04:19:18,707 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cd7364c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:18, skipping insertion in model container [2024-11-28 04:19:18,707 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:19:18" (1/1) ... [2024-11-28 04:19:18,737 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:19:18,925 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/sv-benchmarks/c/combinations/square_7+soft_float_1-2a.c.cil.c[1995,2008] [2024-11-28 04:19:18,932 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/sv-benchmarks/c/combinations/square_7+soft_float_1-2a.c.cil.c[2389,2402] [2024-11-28 04:19:19,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:19:19,022 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:19:19,038 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/sv-benchmarks/c/combinations/square_7+soft_float_1-2a.c.cil.c[1995,2008] [2024-11-28 04:19:19,041 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/sv-benchmarks/c/combinations/square_7+soft_float_1-2a.c.cil.c[2389,2402] [2024-11-28 04:19:19,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:19:19,099 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:19:19,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:19 WrapperNode [2024-11-28 04:19:19,100 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:19:19,101 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:19:19,102 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:19:19,102 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:19:19,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:19" (1/1) ... [2024-11-28 04:19:19,122 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:19" (1/1) ... [2024-11-28 04:19:19,155 INFO L138 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 168 [2024-11-28 04:19:19,159 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:19:19,160 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:19:19,160 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:19:19,160 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:19:19,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:19" (1/1) ... [2024-11-28 04:19:19,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:19" (1/1) ... [2024-11-28 04:19:19,178 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:19" (1/1) ... [2024-11-28 04:19:19,193 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 04:19:19,193 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:19" (1/1) ... [2024-11-28 04:19:19,193 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:19" (1/1) ... [2024-11-28 04:19:19,213 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:19" (1/1) ... [2024-11-28 04:19:19,215 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:19" (1/1) ... [2024-11-28 04:19:19,225 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:19" (1/1) ... [2024-11-28 04:19:19,227 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:19" (1/1) ... [2024-11-28 04:19:19,228 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:19" (1/1) ... [2024-11-28 04:19:19,232 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:19:19,233 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:19:19,233 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:19:19,233 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:19:19,234 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:19" (1/1) ... [2024-11-28 04:19:19,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:19:19,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:19:19,279 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:19:19,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:19:19,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:19:19,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-28 04:19:19,316 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-28 04:19:19,316 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-28 04:19:19,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:19:19,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:19:19,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 04:19:19,316 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 04:19:19,454 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:19:19,457 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:19:24,301 INFO L? ?]: Removed 65 outVars from TransFormulas that were not future-live. [2024-11-28 04:19:24,301 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:19:24,321 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:19:24,321 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 04:19:24,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:19:24 BoogieIcfgContainer [2024-11-28 04:19:24,322 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:19:24,324 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:19:24,325 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:19:24,332 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:19:24,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:19:18" (1/3) ... [2024-11-28 04:19:24,334 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e04c5f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:19:24, skipping insertion in model container [2024-11-28 04:19:24,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:19:19" (2/3) ... [2024-11-28 04:19:24,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e04c5f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:19:24, skipping insertion in model container [2024-11-28 04:19:24,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:19:24" (3/3) ... [2024-11-28 04:19:24,338 INFO L128 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_1-2a.c.cil.c [2024-11-28 04:19:24,359 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:19:24,361 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_7+soft_float_1-2a.c.cil.c that has 3 procedures, 79 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-28 04:19:24,424 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:19:24,438 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@46431abe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:19:24,438 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-28 04:19:24,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 66 states have (on average 1.606060606060606) internal successors, (106), 70 states have internal predecessors, (106), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 04:19:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 04:19:24,450 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:19:24,450 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:19:24,451 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:19:24,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:19:24,456 INFO L85 PathProgramCache]: Analyzing trace with hash 78502818, now seen corresponding path program 1 times [2024-11-28 04:19:24,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:19:24,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964585322] [2024-11-28 04:19:24,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:19:24,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-28 04:19:24,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/mathsat [2024-11-28 04:19:24,470 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-28 04:19:24,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-28 04:19:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:19:25,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 04:19:25,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:19:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:19:25,075 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:19:25,075 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:19:25,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964585322] [2024-11-28 04:19:25,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964585322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:19:25,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:19:25,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:19:25,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214572807] [2024-11-28 04:19:25,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:19:25,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:19:25,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:19:25,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:19:25,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:19:25,109 INFO L87 Difference]: Start difference. First operand has 79 states, 66 states have (on average 1.606060606060606) internal successors, (106), 70 states have internal predecessors, (106), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:19:25,150 INFO L93 Difference]: Finished difference Result 153 states and 244 transitions. [2024-11-28 04:19:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:19:25,152 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-28 04:19:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:19:25,159 INFO L225 Difference]: With dead ends: 153 [2024-11-28 04:19:25,159 INFO L226 Difference]: Without dead ends: 72 [2024-11-28 04:19:25,163 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:19:25,166 INFO L435 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:19:25,167 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:19:25,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-28 04:19:25,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-28 04:19:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.5) internal successors, (90), 63 states have internal predecessors, (90), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 04:19:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 105 transitions. [2024-11-28 04:19:25,208 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 105 transitions. Word has length 7 [2024-11-28 04:19:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:19:25,208 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 105 transitions. [2024-11-28 04:19:25,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:19:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 105 transitions. [2024-11-28 04:19:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 04:19:25,209 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:19:25,210 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:19:25,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-28 04:19:25,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-28 04:19:25,410 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:19:25,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:19:25,411 INFO L85 PathProgramCache]: Analyzing trace with hash 78562400, now seen corresponding path program 1 times [2024-11-28 04:19:25,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:19:25,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957548402] [2024-11-28 04:19:25,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:19:25,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-28 04:19:25,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/mathsat [2024-11-28 04:19:25,416 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-28 04:19:25,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-28 04:28:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:28:47,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:28:47,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:28:56,186 WARN L286 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:29:04,315 WARN L286 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:29:12,561 WARN L286 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:29:16,661 WARN L851 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) |c_ULTIMATE.start_main1_~result~0#1|)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2024-11-28 04:29:33,049 WARN L286 SmtUtils]: Spent 8.24s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:29:40,760 WARN L286 SmtUtils]: Spent 7.71s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:29:48,896 WARN L286 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:30:01,222 WARN L286 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:30:09,488 WARN L286 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:30:17,621 WARN L286 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:30:21,743 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from false [2024-11-28 04:30:25,793 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from true [2024-11-28 04:30:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:25,794 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:30:25,794 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:30:25,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957548402] [2024-11-28 04:30:25,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957548402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:30:25,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:30:25,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:30:25,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241269664] [2024-11-28 04:30:25,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:30:25,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:30:25,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:30:25,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:30:25,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-28 04:30:25,797 INFO L87 Difference]: Start difference. First operand 72 states and 105 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:30,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.24s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 04:30:34,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 04:30:38,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 04:30:38,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:38,737 INFO L93 Difference]: Finished difference Result 72 states and 105 transitions. [2024-11-28 04:30:38,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:30:38,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-28 04:30:38,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:38,740 INFO L225 Difference]: With dead ends: 72 [2024-11-28 04:30:38,741 INFO L226 Difference]: Without dead ends: 67 [2024-11-28 04:30:38,741 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-28 04:30:38,743 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 99 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:38,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 268 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 3 Unknown, 210 Unchecked, 12.9s Time] [2024-11-28 04:30:38,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-28 04:30:38,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-28 04:30:38,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 56 states have (on average 1.5178571428571428) internal successors, (85), 58 states have internal predecessors, (85), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 04:30:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 100 transitions. [2024-11-28 04:30:38,761 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 100 transitions. Word has length 7 [2024-11-28 04:30:38,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:38,761 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 100 transitions. [2024-11-28 04:30:38,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:38,762 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 100 transitions. [2024-11-28 04:30:38,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 04:30:38,764 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:38,764 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:38,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:30:38,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-28 04:30:38,965 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:38,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:38,965 INFO L85 PathProgramCache]: Analyzing trace with hash -531498825, now seen corresponding path program 1 times [2024-11-28 04:30:38,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:30:38,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348526836] [2024-11-28 04:30:38,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:38,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:38,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:38,968 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:30:38,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:30:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:39,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:30:39,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:30:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:30:40,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:30:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:30:40,733 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:30:40,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348526836] [2024-11-28 04:30:40,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348526836] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:30:40,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:30:40,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-28 04:30:40,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705488211] [2024-11-28 04:30:40,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:30:40,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:30:40,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:30:40,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:30:40,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:30:40,737 INFO L87 Difference]: Start difference. First operand 67 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:30:42,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:42,722 INFO L93 Difference]: Finished difference Result 144 states and 222 transitions. [2024-11-28 04:30:42,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:30:42,723 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-11-28 04:30:42,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:42,730 INFO L225 Difference]: With dead ends: 144 [2024-11-28 04:30:42,732 INFO L226 Difference]: Without dead ends: 99 [2024-11-28 04:30:42,733 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:30:42,735 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 31 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:42,736 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 583 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 04:30:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-28 04:30:42,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2024-11-28 04:30:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 82 states have (on average 1.475609756097561) internal successors, (121), 85 states have internal predecessors, (121), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-28 04:30:42,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 146 transitions. [2024-11-28 04:30:42,766 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 146 transitions. Word has length 33 [2024-11-28 04:30:42,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:42,767 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 146 transitions. [2024-11-28 04:30:42,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:30:42,768 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 146 transitions. [2024-11-28 04:30:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 04:30:42,770 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:42,771 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:42,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:30:42,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:42,972 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:42,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:42,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1740441323, now seen corresponding path program 1 times [2024-11-28 04:30:42,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:30:42,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582929914] [2024-11-28 04:30:42,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:42,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:42,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:42,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:30:42,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:30:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:43,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:30:43,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:30:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:30:44,632 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:30:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:30:45,665 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:30:45,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582929914] [2024-11-28 04:30:45,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582929914] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:30:45,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:30:45,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2024-11-28 04:30:45,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932744969] [2024-11-28 04:30:45,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:30:45,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:30:45,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:30:45,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:30:45,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:30:45,668 INFO L87 Difference]: Start difference. First operand 97 states and 146 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:30:49,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:49,717 INFO L93 Difference]: Finished difference Result 229 states and 364 transitions. [2024-11-28 04:30:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:30:49,719 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2024-11-28 04:30:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:49,722 INFO L225 Difference]: With dead ends: 229 [2024-11-28 04:30:49,722 INFO L226 Difference]: Without dead ends: 163 [2024-11-28 04:30:49,723 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:30:49,726 INFO L435 NwaCegarLoop]: 147 mSDtfsCounter, 58 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:49,727 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1203 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-28 04:30:49,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-28 04:30:49,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2024-11-28 04:30:49,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 104 states have (on average 1.3846153846153846) internal successors, (144), 104 states have internal predecessors, (144), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (33), 20 states have call predecessors, (33), 15 states have call successors, (33) [2024-11-28 04:30:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 193 transitions. [2024-11-28 04:30:49,751 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 193 transitions. Word has length 36 [2024-11-28 04:30:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:49,752 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 193 transitions. [2024-11-28 04:30:49,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:30:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 193 transitions. [2024-11-28 04:30:49,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 04:30:49,755 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:49,755 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:49,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 04:30:49,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:49,960 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:49,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:49,960 INFO L85 PathProgramCache]: Analyzing trace with hash 748537497, now seen corresponding path program 1 times [2024-11-28 04:30:49,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:30:49,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226566359] [2024-11-28 04:30:49,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:49,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:49,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:49,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:30:49,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:30:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:50,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:30:50,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:30:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:30:50,392 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:30:50,393 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:30:50,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226566359] [2024-11-28 04:30:50,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226566359] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:30:50,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:30:50,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:30:50,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415069278] [2024-11-28 04:30:50,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:30:50,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:30:50,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:30:50,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:30:50,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:30:50,395 INFO L87 Difference]: Start difference. First operand 125 states and 193 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:30:50,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:50,915 INFO L93 Difference]: Finished difference Result 239 states and 370 transitions. [2024-11-28 04:30:50,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:30:50,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-11-28 04:30:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:50,919 INFO L225 Difference]: With dead ends: 239 [2024-11-28 04:30:50,919 INFO L226 Difference]: Without dead ends: 118 [2024-11-28 04:30:50,920 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:30:50,921 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 22 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:50,922 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 257 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:30:50,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-28 04:30:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2024-11-28 04:30:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 90 states have (on average 1.3888888888888888) internal successors, (125), 94 states have internal predecessors, (125), 12 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (23), 13 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-28 04:30:50,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 160 transitions. [2024-11-28 04:30:50,941 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 160 transitions. Word has length 39 [2024-11-28 04:30:50,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:50,941 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 160 transitions. [2024-11-28 04:30:50,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:30:50,941 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 160 transitions. [2024-11-28 04:30:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 04:30:50,943 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:50,943 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:50,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:30:51,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:51,144 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:51,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:51,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1688699891, now seen corresponding path program 1 times [2024-11-28 04:30:51,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:30:51,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854010051] [2024-11-28 04:30:51,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:51,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:51,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:51,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:30:51,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:30:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:51,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 04:30:51,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:30:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:30:53,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:30:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:30:54,921 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:30:54,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854010051] [2024-11-28 04:30:54,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854010051] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:30:54,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:30:54,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2024-11-28 04:30:54,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565031953] [2024-11-28 04:30:54,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:30:54,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:30:54,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:30:54,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:30:54,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:30:54,924 INFO L87 Difference]: Start difference. First operand 108 states and 160 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:30:57,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:57,363 INFO L93 Difference]: Finished difference Result 226 states and 336 transitions. [2024-11-28 04:30:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:30:57,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-28 04:30:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:57,367 INFO L225 Difference]: With dead ends: 226 [2024-11-28 04:30:57,368 INFO L226 Difference]: Without dead ends: 171 [2024-11-28 04:30:57,369 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:30:57,370 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 37 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:57,371 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 425 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 04:30:57,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-28 04:30:57,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 129. [2024-11-28 04:30:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 111 states have (on average 1.3423423423423424) internal successors, (149), 112 states have internal predecessors, (149), 12 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (23), 16 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-28 04:30:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 184 transitions. [2024-11-28 04:30:57,410 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 184 transitions. Word has length 40 [2024-11-28 04:30:57,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:57,414 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 184 transitions. [2024-11-28 04:30:57,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:30:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 184 transitions. [2024-11-28 04:30:57,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 04:30:57,417 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:57,417 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:57,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 04:30:57,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:57,618 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:30:57,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:57,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1631441589, now seen corresponding path program 1 times [2024-11-28 04:30:57,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:30:57,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359549967] [2024-11-28 04:30:57,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:57,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:30:57,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:57,621 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:30:57,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:30:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:57,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:30:57,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:30:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:30:58,594 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:30:58,594 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:30:58,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359549967] [2024-11-28 04:30:58,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359549967] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:30:58,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:30:58,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 04:30:58,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752797688] [2024-11-28 04:30:58,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:30:58,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:30:58,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:30:58,596 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:30:58,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:30:58,598 INFO L87 Difference]: Start difference. First operand 129 states and 184 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:30:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:30:59,900 INFO L93 Difference]: Finished difference Result 228 states and 334 transitions. [2024-11-28 04:30:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:30:59,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-28 04:30:59,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:30:59,904 INFO L225 Difference]: With dead ends: 228 [2024-11-28 04:30:59,904 INFO L226 Difference]: Without dead ends: 167 [2024-11-28 04:30:59,905 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:30:59,909 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 30 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:30:59,909 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 499 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 04:30:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-28 04:30:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2024-11-28 04:30:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 143 states have (on average 1.3496503496503496) internal successors, (193), 146 states have internal predecessors, (193), 16 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (27), 20 states have call predecessors, (27), 15 states have call successors, (27) [2024-11-28 04:30:59,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 236 transitions. [2024-11-28 04:30:59,932 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 236 transitions. Word has length 40 [2024-11-28 04:30:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:30:59,933 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 236 transitions. [2024-11-28 04:30:59,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:30:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 236 transitions. [2024-11-28 04:30:59,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:30:59,935 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:30:59,936 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:30:59,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 04:31:00,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:00,140 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:00,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:00,140 INFO L85 PathProgramCache]: Analyzing trace with hash 923141631, now seen corresponding path program 2 times [2024-11-28 04:31:00,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:00,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089432039] [2024-11-28 04:31:00,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:31:00,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:00,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:00,149 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:00,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:31:00,220 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:31:00,220 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:31:00,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:31:00,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:31:01,071 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:31:01,071 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:01,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089432039] [2024-11-28 04:31:01,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089432039] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:01,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:01,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 04:31:01,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999964394] [2024-11-28 04:31:01,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:01,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:31:01,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:01,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:31:01,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:31:01,074 INFO L87 Difference]: Start difference. First operand 165 states and 236 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:02,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:02,599 INFO L93 Difference]: Finished difference Result 283 states and 411 transitions. [2024-11-28 04:31:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:31:02,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-28 04:31:02,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:02,602 INFO L225 Difference]: With dead ends: 283 [2024-11-28 04:31:02,602 INFO L226 Difference]: Without dead ends: 236 [2024-11-28 04:31:02,603 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:31:02,606 INFO L435 NwaCegarLoop]: 145 mSDtfsCounter, 47 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:02,607 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 781 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 04:31:02,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-28 04:31:02,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2024-11-28 04:31:02,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 207 states have (on average 1.357487922705314) internal successors, (281), 209 states have internal predecessors, (281), 22 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (33), 29 states have call predecessors, (33), 21 states have call successors, (33) [2024-11-28 04:31:02,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 336 transitions. [2024-11-28 04:31:02,635 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 336 transitions. Word has length 43 [2024-11-28 04:31:02,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:02,635 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 336 transitions. [2024-11-28 04:31:02,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 336 transitions. [2024-11-28 04:31:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:31:02,638 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:02,638 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:02,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 04:31:02,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:02,839 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:02,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:02,839 INFO L85 PathProgramCache]: Analyzing trace with hash 243083261, now seen corresponding path program 1 times [2024-11-28 04:31:02,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:02,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419882819] [2024-11-28 04:31:02,840 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:02,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:02,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:02,842 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:02,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:31:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:02,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:31:02,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:31:03,742 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:31:04,389 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:04,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419882819] [2024-11-28 04:31:04,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419882819] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:31:04,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:31:04,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2024-11-28 04:31:04,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167437280] [2024-11-28 04:31:04,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:31:04,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:31:04,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:04,391 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:31:04,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:31:04,392 INFO L87 Difference]: Start difference. First operand 235 states and 336 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:31:05,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:05,830 INFO L93 Difference]: Finished difference Result 408 states and 600 transitions. [2024-11-28 04:31:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:31:05,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-28 04:31:05,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:05,835 INFO L225 Difference]: With dead ends: 408 [2024-11-28 04:31:05,838 INFO L226 Difference]: Without dead ends: 326 [2024-11-28 04:31:05,839 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:31:05,840 INFO L435 NwaCegarLoop]: 126 mSDtfsCounter, 46 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:05,840 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 701 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 04:31:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-28 04:31:05,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 322. [2024-11-28 04:31:05,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 284 states have (on average 1.3591549295774648) internal successors, (386), 289 states have internal predecessors, (386), 32 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (43), 39 states have call predecessors, (43), 31 states have call successors, (43) [2024-11-28 04:31:05,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 461 transitions. [2024-11-28 04:31:05,871 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 461 transitions. Word has length 43 [2024-11-28 04:31:05,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:05,871 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 461 transitions. [2024-11-28 04:31:05,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:31:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 461 transitions. [2024-11-28 04:31:05,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:31:05,872 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:05,872 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:05,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 04:31:06,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:06,073 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:06,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:06,074 INFO L85 PathProgramCache]: Analyzing trace with hash 300341563, now seen corresponding path program 1 times [2024-11-28 04:31:06,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:06,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800047833] [2024-11-28 04:31:06,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:06,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:06,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:06,077 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:06,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:31:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:06,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 04:31:06,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:31:08,477 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:31:08,477 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:08,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800047833] [2024-11-28 04:31:08,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800047833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:08,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:08,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-28 04:31:08,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487471361] [2024-11-28 04:31:08,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:08,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:31:08,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:08,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:31:08,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:31:08,480 INFO L87 Difference]: Start difference. First operand 322 states and 461 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:31:14,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:14,210 INFO L93 Difference]: Finished difference Result 355 states and 504 transitions. [2024-11-28 04:31:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:31:14,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-28 04:31:14,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:14,215 INFO L225 Difference]: With dead ends: 355 [2024-11-28 04:31:14,215 INFO L226 Difference]: Without dead ends: 326 [2024-11-28 04:31:14,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:31:14,217 INFO L435 NwaCegarLoop]: 142 mSDtfsCounter, 75 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:14,218 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1417 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-28 04:31:14,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-28 04:31:14,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2024-11-28 04:31:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 287 states have (on average 1.3519163763066202) internal successors, (388), 292 states have internal predecessors, (388), 32 states have call successors, (32), 3 states have call predecessors, (32), 6 states have return successors, (43), 39 states have call predecessors, (43), 31 states have call successors, (43) [2024-11-28 04:31:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 463 transitions. [2024-11-28 04:31:14,251 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 463 transitions. Word has length 43 [2024-11-28 04:31:14,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:14,252 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 463 transitions. [2024-11-28 04:31:14,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:31:14,252 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 463 transitions. [2024-11-28 04:31:14,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:31:14,254 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:14,254 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:14,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:31:14,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:14,455 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:14,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:14,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1898956665, now seen corresponding path program 1 times [2024-11-28 04:31:14,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:14,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227570207] [2024-11-28 04:31:14,456 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:14,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:14,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:14,458 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:14,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:31:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:14,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:31:14,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:31:15,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:31:16,419 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:16,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227570207] [2024-11-28 04:31:16,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227570207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:31:16,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:31:16,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-28 04:31:16,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529053040] [2024-11-28 04:31:16,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:31:16,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:31:16,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:16,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:31:16,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:31:16,422 INFO L87 Difference]: Start difference. First operand 326 states and 463 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:31:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:18,006 INFO L93 Difference]: Finished difference Result 559 states and 820 transitions. [2024-11-28 04:31:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:31:18,007 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-28 04:31:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:18,014 INFO L225 Difference]: With dead ends: 559 [2024-11-28 04:31:18,014 INFO L226 Difference]: Without dead ends: 433 [2024-11-28 04:31:18,015 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:31:18,017 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 30 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:18,018 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 549 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 04:31:18,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2024-11-28 04:31:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 368. [2024-11-28 04:31:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 325 states have (on average 1.3476923076923077) internal successors, (438), 332 states have internal predecessors, (438), 36 states have call successors, (36), 3 states have call predecessors, (36), 6 states have return successors, (47), 43 states have call predecessors, (47), 35 states have call successors, (47) [2024-11-28 04:31:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 521 transitions. [2024-11-28 04:31:18,071 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 521 transitions. Word has length 43 [2024-11-28 04:31:18,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:18,073 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 521 transitions. [2024-11-28 04:31:18,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:31:18,074 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 521 transitions. [2024-11-28 04:31:18,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:31:18,076 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:18,076 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:18,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:31:18,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:18,277 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:18,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:18,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1218898295, now seen corresponding path program 1 times [2024-11-28 04:31:18,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:18,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443797447] [2024-11-28 04:31:18,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:18,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:18,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:18,280 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:18,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:31:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:18,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:31:18,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:31:19,994 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:22,708 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:22,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443797447] [2024-11-28 04:31:22,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443797447] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:22,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1029175987] [2024-11-28 04:31:22,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:22,708 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:31:22,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:31:22,714 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:31:22,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2024-11-28 04:31:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:22,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:31:22,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:31:23,679 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:24,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1029175987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:24,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:31:24,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-28 04:31:24,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887235598] [2024-11-28 04:31:24,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:31:24,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:31:24,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:24,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:31:24,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:31:24,098 INFO L87 Difference]: Start difference. First operand 368 states and 521 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:31:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:27,209 INFO L93 Difference]: Finished difference Result 378 states and 530 transitions. [2024-11-28 04:31:27,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:31:27,210 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-28 04:31:27,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:27,212 INFO L225 Difference]: With dead ends: 378 [2024-11-28 04:31:27,213 INFO L226 Difference]: Without dead ends: 376 [2024-11-28 04:31:27,213 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:31:27,214 INFO L435 NwaCegarLoop]: 130 mSDtfsCounter, 48 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:27,214 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1094 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 04:31:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2024-11-28 04:31:27,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 372. [2024-11-28 04:31:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 328 states have (on average 1.3445121951219512) internal successors, (441), 335 states have internal predecessors, (441), 36 states have call successors, (36), 4 states have call predecessors, (36), 7 states have return successors, (47), 43 states have call predecessors, (47), 35 states have call successors, (47) [2024-11-28 04:31:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 524 transitions. [2024-11-28 04:31:27,252 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 524 transitions. Word has length 43 [2024-11-28 04:31:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:27,254 INFO L471 AbstractCegarLoop]: Abstraction has 372 states and 524 transitions. [2024-11-28 04:31:27,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:31:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 524 transitions. [2024-11-28 04:31:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:31:27,255 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:27,256 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:27,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2024-11-28 04:31:27,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 04:31:27,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:27,659 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:27,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:27,659 INFO L85 PathProgramCache]: Analyzing trace with hash 100867385, now seen corresponding path program 1 times [2024-11-28 04:31:27,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:27,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679183552] [2024-11-28 04:31:27,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:27,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:27,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:27,665 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:27,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:31:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:27,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:31:27,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:31:29,631 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:31:29,631 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:29,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679183552] [2024-11-28 04:31:29,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679183552] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:29,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:29,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 04:31:29,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769015103] [2024-11-28 04:31:29,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:29,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:31:29,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:29,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:31:29,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:31:29,634 INFO L87 Difference]: Start difference. First operand 372 states and 524 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:33,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:33,533 INFO L93 Difference]: Finished difference Result 427 states and 599 transitions. [2024-11-28 04:31:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:31:33,534 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-28 04:31:33,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:33,537 INFO L225 Difference]: With dead ends: 427 [2024-11-28 04:31:33,538 INFO L226 Difference]: Without dead ends: 340 [2024-11-28 04:31:33,538 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:31:33,539 INFO L435 NwaCegarLoop]: 131 mSDtfsCounter, 60 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:33,540 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1226 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-28 04:31:33,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2024-11-28 04:31:33,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 332. [2024-11-28 04:31:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 291 states have (on average 1.3367697594501717) internal successors, (389), 296 states have internal predecessors, (389), 32 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (43), 39 states have call predecessors, (43), 31 states have call successors, (43) [2024-11-28 04:31:33,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 464 transitions. [2024-11-28 04:31:33,566 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 464 transitions. Word has length 43 [2024-11-28 04:31:33,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:33,567 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 464 transitions. [2024-11-28 04:31:33,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:33,567 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 464 transitions. [2024-11-28 04:31:33,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:31:33,568 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:33,568 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:33,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:31:33,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:33,769 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:33,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:33,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1019424117, now seen corresponding path program 1 times [2024-11-28 04:31:33,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:33,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809423066] [2024-11-28 04:31:33,770 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:33,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:33,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:33,773 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:33,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:31:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:33,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:31:33,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:31:34,635 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:31:34,636 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:34,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809423066] [2024-11-28 04:31:34,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809423066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:34,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:34,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:31:34,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77924249] [2024-11-28 04:31:34,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:34,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:31:34,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:34,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:31:34,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:31:34,638 INFO L87 Difference]: Start difference. First operand 332 states and 464 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:36,084 INFO L93 Difference]: Finished difference Result 348 states and 481 transitions. [2024-11-28 04:31:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:31:36,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-28 04:31:36,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:36,089 INFO L225 Difference]: With dead ends: 348 [2024-11-28 04:31:36,090 INFO L226 Difference]: Without dead ends: 346 [2024-11-28 04:31:36,090 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:31:36,091 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 3 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:36,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 460 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 04:31:36,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2024-11-28 04:31:36,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 338. [2024-11-28 04:31:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 295 states have (on average 1.335593220338983) internal successors, (394), 301 states have internal predecessors, (394), 33 states have call successors, (33), 6 states have call predecessors, (33), 9 states have return successors, (44), 39 states have call predecessors, (44), 32 states have call successors, (44) [2024-11-28 04:31:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 471 transitions. [2024-11-28 04:31:36,138 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 471 transitions. Word has length 43 [2024-11-28 04:31:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:36,139 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 471 transitions. [2024-11-28 04:31:36,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:36,139 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 471 transitions. [2024-11-28 04:31:36,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:31:36,142 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:36,142 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:36,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 04:31:36,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:36,343 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:36,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:36,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1076682419, now seen corresponding path program 1 times [2024-11-28 04:31:36,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:36,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438694843] [2024-11-28 04:31:36,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:36,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:36,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:36,347 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:36,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:31:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:36,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:31:36,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:31:37,211 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:31:37,212 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:37,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438694843] [2024-11-28 04:31:37,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438694843] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:37,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:37,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:31:37,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958896128] [2024-11-28 04:31:37,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:37,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:31:37,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:37,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:31:37,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:31:37,215 INFO L87 Difference]: Start difference. First operand 338 states and 471 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:38,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:38,195 INFO L93 Difference]: Finished difference Result 344 states and 476 transitions. [2024-11-28 04:31:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:31:38,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-28 04:31:38,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:38,199 INFO L225 Difference]: With dead ends: 344 [2024-11-28 04:31:38,199 INFO L226 Difference]: Without dead ends: 342 [2024-11-28 04:31:38,200 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:31:38,201 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:38,201 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 455 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:31:38,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-28 04:31:38,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 336. [2024-11-28 04:31:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 294 states have (on average 1.3333333333333333) internal successors, (392), 299 states have internal predecessors, (392), 32 states have call successors, (32), 6 states have call predecessors, (32), 9 states have return successors, (43), 39 states have call predecessors, (43), 31 states have call successors, (43) [2024-11-28 04:31:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 467 transitions. [2024-11-28 04:31:38,231 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 467 transitions. Word has length 43 [2024-11-28 04:31:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:38,231 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 467 transitions. [2024-11-28 04:31:38,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 467 transitions. [2024-11-28 04:31:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 04:31:38,233 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:38,233 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:38,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 04:31:38,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:38,434 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:38,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:38,434 INFO L85 PathProgramCache]: Analyzing trace with hash -595914348, now seen corresponding path program 1 times [2024-11-28 04:31:38,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:38,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943728091] [2024-11-28 04:31:38,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:38,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:38,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:38,437 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:38,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:31:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:38,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:31:38,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:31:38,921 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:31:38,921 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:38,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943728091] [2024-11-28 04:31:38,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943728091] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:38,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:38,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:31:38,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852513970] [2024-11-28 04:31:38,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:38,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:31:38,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:38,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:31:38,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:31:38,924 INFO L87 Difference]: Start difference. First operand 336 states and 467 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:39,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:39,114 INFO L93 Difference]: Finished difference Result 453 states and 642 transitions. [2024-11-28 04:31:39,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:31:39,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-28 04:31:39,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:39,117 INFO L225 Difference]: With dead ends: 453 [2024-11-28 04:31:39,117 INFO L226 Difference]: Without dead ends: 358 [2024-11-28 04:31:39,118 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:31:39,119 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 14 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:39,119 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 307 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:31:39,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-11-28 04:31:39,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2024-11-28 04:31:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 318 states have (on average 1.2924528301886793) internal successors, (411), 320 states have internal predecessors, (411), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-28 04:31:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 482 transitions. [2024-11-28 04:31:39,149 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 482 transitions. Word has length 44 [2024-11-28 04:31:39,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:39,150 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 482 transitions. [2024-11-28 04:31:39,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:39,150 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 482 transitions. [2024-11-28 04:31:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 04:31:39,151 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:39,151 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:39,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 04:31:39,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:39,356 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:39,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:39,356 INFO L85 PathProgramCache]: Analyzing trace with hash 387869080, now seen corresponding path program 1 times [2024-11-28 04:31:39,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:39,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843026782] [2024-11-28 04:31:39,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:39,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:39,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:39,359 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:39,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 04:31:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:39,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:31:39,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:31:39,590 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:31:39,590 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:39,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843026782] [2024-11-28 04:31:39,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843026782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:39,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:39,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:31:39,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859011805] [2024-11-28 04:31:39,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:39,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:31:39,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:39,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:31:39,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:31:39,592 INFO L87 Difference]: Start difference. First operand 358 states and 482 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:39,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:39,748 INFO L93 Difference]: Finished difference Result 371 states and 497 transitions. [2024-11-28 04:31:39,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:31:39,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-28 04:31:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:39,752 INFO L225 Difference]: With dead ends: 371 [2024-11-28 04:31:39,752 INFO L226 Difference]: Without dead ends: 364 [2024-11-28 04:31:39,753 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:31:39,753 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 0 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:39,754 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 282 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:31:39,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-28 04:31:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2024-11-28 04:31:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 324 states have (on average 1.287037037037037) internal successors, (417), 326 states have internal predecessors, (417), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-28 04:31:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 488 transitions. [2024-11-28 04:31:39,789 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 488 transitions. Word has length 45 [2024-11-28 04:31:39,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:39,790 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 488 transitions. [2024-11-28 04:31:39,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:39,790 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 488 transitions. [2024-11-28 04:31:39,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 04:31:39,792 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:39,792 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:39,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 04:31:39,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:39,993 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:39,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:39,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2132090854, now seen corresponding path program 1 times [2024-11-28 04:31:39,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:39,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78034561] [2024-11-28 04:31:39,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:39,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:39,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:39,999 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:40,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 04:31:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:40,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:31:40,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:31:40,361 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:31:40,361 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:40,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78034561] [2024-11-28 04:31:40,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78034561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:40,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:40,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:31:40,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197970841] [2024-11-28 04:31:40,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:40,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:31:40,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:40,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:31:40,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:31:40,364 INFO L87 Difference]: Start difference. First operand 364 states and 488 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:40,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:40,715 INFO L93 Difference]: Finished difference Result 371 states and 494 transitions. [2024-11-28 04:31:40,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:31:40,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-28 04:31:40,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:40,718 INFO L225 Difference]: With dead ends: 371 [2024-11-28 04:31:40,718 INFO L226 Difference]: Without dead ends: 364 [2024-11-28 04:31:40,719 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:31:40,720 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 3 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:40,720 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 375 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:31:40,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-28 04:31:40,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 358. [2024-11-28 04:31:40,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 318 states have (on average 1.279874213836478) internal successors, (407), 320 states have internal predecessors, (407), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-28 04:31:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 478 transitions. [2024-11-28 04:31:40,750 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 478 transitions. Word has length 45 [2024-11-28 04:31:40,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:40,750 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 478 transitions. [2024-11-28 04:31:40,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:40,750 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 478 transitions. [2024-11-28 04:31:40,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 04:31:40,752 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:40,752 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:40,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 04:31:40,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:40,952 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:40,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:40,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2069480440, now seen corresponding path program 1 times [2024-11-28 04:31:40,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:40,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512877631] [2024-11-28 04:31:40,953 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:40,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:40,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:40,956 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:40,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 04:31:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:41,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:31:41,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:31:41,329 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:31:41,329 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:41,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512877631] [2024-11-28 04:31:41,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512877631] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:41,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:41,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:31:41,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354233599] [2024-11-28 04:31:41,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:41,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:31:41,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:41,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:31:41,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:31:41,331 INFO L87 Difference]: Start difference. First operand 358 states and 478 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:41,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:41,504 INFO L93 Difference]: Finished difference Result 390 states and 519 transitions. [2024-11-28 04:31:41,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:31:41,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-28 04:31:41,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:41,508 INFO L225 Difference]: With dead ends: 390 [2024-11-28 04:31:41,508 INFO L226 Difference]: Without dead ends: 353 [2024-11-28 04:31:41,508 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:31:41,509 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 15 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:41,510 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 274 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:31:41,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2024-11-28 04:31:41,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 342. [2024-11-28 04:31:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 306 states have (on average 1.2679738562091503) internal successors, (388), 306 states have internal predecessors, (388), 26 states have call successors, (26), 6 states have call predecessors, (26), 9 states have return successors, (37), 33 states have call predecessors, (37), 25 states have call successors, (37) [2024-11-28 04:31:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 451 transitions. [2024-11-28 04:31:41,534 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 451 transitions. Word has length 45 [2024-11-28 04:31:41,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:41,534 INFO L471 AbstractCegarLoop]: Abstraction has 342 states and 451 transitions. [2024-11-28 04:31:41,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:41,535 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 451 transitions. [2024-11-28 04:31:41,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 04:31:41,536 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:41,536 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:41,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 04:31:41,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:41,741 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:41,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:41,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2048901964, now seen corresponding path program 1 times [2024-11-28 04:31:41,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:41,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811977345] [2024-11-28 04:31:41,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:41,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:41,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:41,744 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:41,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 04:31:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:41,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:31:41,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 04:31:42,047 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:31:42,047 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:42,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811977345] [2024-11-28 04:31:42,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811977345] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:42,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:42,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:31:42,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223747987] [2024-11-28 04:31:42,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:42,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:31:42,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:42,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:31:42,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:31:42,049 INFO L87 Difference]: Start difference. First operand 342 states and 451 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:42,640 INFO L93 Difference]: Finished difference Result 400 states and 533 transitions. [2024-11-28 04:31:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:31:42,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-28 04:31:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:42,644 INFO L225 Difference]: With dead ends: 400 [2024-11-28 04:31:42,644 INFO L226 Difference]: Without dead ends: 345 [2024-11-28 04:31:42,645 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:31:42,646 INFO L435 NwaCegarLoop]: 106 mSDtfsCounter, 41 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:42,647 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 264 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:31:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2024-11-28 04:31:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 344. [2024-11-28 04:31:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 308 states have (on average 1.2597402597402598) internal successors, (388), 308 states have internal predecessors, (388), 26 states have call successors, (26), 6 states have call predecessors, (26), 9 states have return successors, (37), 33 states have call predecessors, (37), 25 states have call successors, (37) [2024-11-28 04:31:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 451 transitions. [2024-11-28 04:31:42,685 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 451 transitions. Word has length 48 [2024-11-28 04:31:42,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:42,685 INFO L471 AbstractCegarLoop]: Abstraction has 344 states and 451 transitions. [2024-11-28 04:31:42,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:42,686 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 451 transitions. [2024-11-28 04:31:42,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 04:31:42,687 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:42,688 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:42,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 04:31:42,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:42,890 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:42,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:42,893 INFO L85 PathProgramCache]: Analyzing trace with hash 142055626, now seen corresponding path program 1 times [2024-11-28 04:31:42,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:42,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460337127] [2024-11-28 04:31:42,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:42,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:42,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:42,897 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:42,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 04:31:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:42,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:31:42,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:31:45,196 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:31:45,196 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:45,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460337127] [2024-11-28 04:31:45,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460337127] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:45,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:45,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 04:31:45,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688225335] [2024-11-28 04:31:45,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:45,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:31:45,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:45,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:31:45,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:31:45,199 INFO L87 Difference]: Start difference. First operand 344 states and 451 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:50,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:50,725 INFO L93 Difference]: Finished difference Result 387 states and 510 transitions. [2024-11-28 04:31:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:31:50,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-28 04:31:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:50,729 INFO L225 Difference]: With dead ends: 387 [2024-11-28 04:31:50,729 INFO L226 Difference]: Without dead ends: 364 [2024-11-28 04:31:50,729 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:31:50,730 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 69 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:50,730 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 940 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-28 04:31:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-28 04:31:50,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 359. [2024-11-28 04:31:50,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 321 states have (on average 1.2585669781931463) internal successors, (404), 322 states have internal predecessors, (404), 28 states have call successors, (28), 6 states have call predecessors, (28), 9 states have return successors, (39), 35 states have call predecessors, (39), 27 states have call successors, (39) [2024-11-28 04:31:50,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 471 transitions. [2024-11-28 04:31:50,769 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 471 transitions. Word has length 48 [2024-11-28 04:31:50,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:50,769 INFO L471 AbstractCegarLoop]: Abstraction has 359 states and 471 transitions. [2024-11-28 04:31:50,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:50,770 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 471 transitions. [2024-11-28 04:31:50,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 04:31:50,771 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:50,772 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:50,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 04:31:50,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:50,976 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:50,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:50,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1113305586, now seen corresponding path program 1 times [2024-11-28 04:31:50,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:50,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058619432] [2024-11-28 04:31:50,977 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:50,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:50,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:50,980 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:50,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 04:31:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:51,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:31:51,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:31:51,470 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:31:51,470 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:51,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058619432] [2024-11-28 04:31:51,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058619432] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:51,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:51,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:31:51,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456933526] [2024-11-28 04:31:51,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:51,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:31:51,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:51,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:31:51,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:31:51,474 INFO L87 Difference]: Start difference. First operand 359 states and 471 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:52,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:52,569 INFO L93 Difference]: Finished difference Result 430 states and 571 transitions. [2024-11-28 04:31:52,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:31:52,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-28 04:31:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:52,573 INFO L225 Difference]: With dead ends: 430 [2024-11-28 04:31:52,573 INFO L226 Difference]: Without dead ends: 381 [2024-11-28 04:31:52,574 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:31:52,576 INFO L435 NwaCegarLoop]: 123 mSDtfsCounter, 52 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:52,576 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 413 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 04:31:52,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2024-11-28 04:31:52,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 343. [2024-11-28 04:31:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 307 states have (on average 1.254071661237785) internal successors, (385), 307 states have internal predecessors, (385), 26 states have call successors, (26), 6 states have call predecessors, (26), 9 states have return successors, (37), 33 states have call predecessors, (37), 25 states have call successors, (37) [2024-11-28 04:31:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 448 transitions. [2024-11-28 04:31:52,603 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 448 transitions. Word has length 48 [2024-11-28 04:31:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:52,604 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 448 transitions. [2024-11-28 04:31:52,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:52,604 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 448 transitions. [2024-11-28 04:31:52,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 04:31:52,605 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:52,606 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:52,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 04:31:52,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:52,810 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:52,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:52,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1453533571, now seen corresponding path program 1 times [2024-11-28 04:31:52,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:52,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386415238] [2024-11-28 04:31:52,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:52,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:52,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:52,813 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:52,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 04:31:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:52,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:31:52,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:31:54,679 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:31:55,740 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:55,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386415238] [2024-11-28 04:31:55,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386415238] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:55,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:31:55,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-28 04:31:55,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099452547] [2024-11-28 04:31:55,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:55,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:31:55,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:55,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:31:55,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:31:55,742 INFO L87 Difference]: Start difference. First operand 343 states and 448 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:57,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:57,301 INFO L93 Difference]: Finished difference Result 489 states and 660 transitions. [2024-11-28 04:31:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:31:57,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-28 04:31:57,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:57,304 INFO L225 Difference]: With dead ends: 489 [2024-11-28 04:31:57,304 INFO L226 Difference]: Without dead ends: 449 [2024-11-28 04:31:57,304 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:31:57,305 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 25 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:57,305 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 352 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 04:31:57,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2024-11-28 04:31:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 358. [2024-11-28 04:31:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 318 states have (on average 1.2452830188679245) internal successors, (396), 318 states have internal predecessors, (396), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-28 04:31:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 467 transitions. [2024-11-28 04:31:57,334 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 467 transitions. Word has length 49 [2024-11-28 04:31:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:57,334 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 467 transitions. [2024-11-28 04:31:57,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 467 transitions. [2024-11-28 04:31:57,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 04:31:57,336 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:57,336 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:57,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 04:31:57,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:57,537 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:57,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:57,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2140369147, now seen corresponding path program 1 times [2024-11-28 04:31:57,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:57,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114328210] [2024-11-28 04:31:57,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:57,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:57,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:57,542 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:57,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 04:31:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:57,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:31:57,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:31:57,861 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:31:57,862 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:31:57,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114328210] [2024-11-28 04:31:57,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114328210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:57,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:57,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:31:57,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330513417] [2024-11-28 04:31:57,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:57,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:31:57,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:31:57,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:31:57,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:31:57,864 INFO L87 Difference]: Start difference. First operand 358 states and 467 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:58,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:58,056 INFO L93 Difference]: Finished difference Result 377 states and 488 transitions. [2024-11-28 04:31:58,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:31:58,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-28 04:31:58,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:58,060 INFO L225 Difference]: With dead ends: 377 [2024-11-28 04:31:58,060 INFO L226 Difference]: Without dead ends: 339 [2024-11-28 04:31:58,061 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:31:58,064 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 0 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:58,064 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 279 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:31:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2024-11-28 04:31:58,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 338. [2024-11-28 04:31:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 298 states have (on average 1.2416107382550337) internal successors, (370), 299 states have internal predecessors, (370), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (39), 36 states have call predecessors, (39), 29 states have call successors, (39) [2024-11-28 04:31:58,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 439 transitions. [2024-11-28 04:31:58,098 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 439 transitions. Word has length 49 [2024-11-28 04:31:58,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:58,098 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 439 transitions. [2024-11-28 04:31:58,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:31:58,099 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 439 transitions. [2024-11-28 04:31:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 04:31:58,100 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:58,100 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:58,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 04:31:58,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:58,305 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:58,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:58,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1929516195, now seen corresponding path program 1 times [2024-11-28 04:31:58,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:31:58,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707201697] [2024-11-28 04:31:58,306 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:58,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:58,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:58,311 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:58,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 04:31:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:58,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:31:58,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:32:00,990 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:32:00,991 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:32:00,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707201697] [2024-11-28 04:32:00,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707201697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:32:00,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:32:00,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 04:32:00,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230429023] [2024-11-28 04:32:00,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:32:00,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:32:00,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:32:00,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:32:00,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:32:00,993 INFO L87 Difference]: Start difference. First operand 338 states and 439 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:32:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:32:04,888 INFO L93 Difference]: Finished difference Result 404 states and 529 transitions. [2024-11-28 04:32:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:32:04,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-28 04:32:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:32:04,891 INFO L225 Difference]: With dead ends: 404 [2024-11-28 04:32:04,891 INFO L226 Difference]: Without dead ends: 371 [2024-11-28 04:32:04,892 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:32:04,893 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 74 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:32:04,893 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 548 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-28 04:32:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2024-11-28 04:32:04,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 360. [2024-11-28 04:32:04,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 316 states have (on average 1.2373417721518987) internal successors, (391), 319 states have internal predecessors, (391), 34 states have call successors, (34), 6 states have call predecessors, (34), 9 states have return successors, (42), 39 states have call predecessors, (42), 32 states have call successors, (42) [2024-11-28 04:32:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 467 transitions. [2024-11-28 04:32:04,930 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 467 transitions. Word has length 50 [2024-11-28 04:32:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:32:04,931 INFO L471 AbstractCegarLoop]: Abstraction has 360 states and 467 transitions. [2024-11-28 04:32:04,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:32:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 467 transitions. [2024-11-28 04:32:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 04:32:04,933 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:32:04,933 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:04,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 04:32:05,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:05,134 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:32:05,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:05,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1787300319, now seen corresponding path program 1 times [2024-11-28 04:32:05,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:32:05,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003900022] [2024-11-28 04:32:05,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:32:05,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:05,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:05,139 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:05,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 04:32:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:32:05,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:32:05,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:32:06,068 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:32:06,068 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:32:06,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003900022] [2024-11-28 04:32:06,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003900022] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:32:06,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:32:06,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 04:32:06,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446680564] [2024-11-28 04:32:06,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:32:06,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:32:06,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:32:06,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:32:06,070 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:32:06,071 INFO L87 Difference]: Start difference. First operand 360 states and 467 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:32:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:32:08,621 INFO L93 Difference]: Finished difference Result 475 states and 624 transitions. [2024-11-28 04:32:08,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:32:08,624 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-28 04:32:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:32:08,627 INFO L225 Difference]: With dead ends: 475 [2024-11-28 04:32:08,628 INFO L226 Difference]: Without dead ends: 451 [2024-11-28 04:32:08,629 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:32:08,630 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 27 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:32:08,630 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 443 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 04:32:08,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-11-28 04:32:08,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 373. [2024-11-28 04:32:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 325 states have (on average 1.2523076923076923) internal successors, (407), 330 states have internal predecessors, (407), 38 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (46), 42 states have call predecessors, (46), 36 states have call successors, (46) [2024-11-28 04:32:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 491 transitions. [2024-11-28 04:32:08,676 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 491 transitions. Word has length 50 [2024-11-28 04:32:08,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:32:08,676 INFO L471 AbstractCegarLoop]: Abstraction has 373 states and 491 transitions. [2024-11-28 04:32:08,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:32:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 491 transitions. [2024-11-28 04:32:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 04:32:08,678 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:32:08,678 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:08,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 04:32:08,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:08,879 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:32:08,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:08,880 INFO L85 PathProgramCache]: Analyzing trace with hash -865053569, now seen corresponding path program 1 times [2024-11-28 04:32:08,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:32:08,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988543606] [2024-11-28 04:32:08,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:32:08,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:08,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:08,883 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:08,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 04:32:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:32:08,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:32:08,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:32:09,390 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:32:09,390 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:32:09,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988543606] [2024-11-28 04:32:09,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988543606] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:32:09,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:32:09,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:32:09,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211237316] [2024-11-28 04:32:09,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:32:09,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:32:09,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:32:09,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:32:09,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:32:09,393 INFO L87 Difference]: Start difference. First operand 373 states and 491 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:32:09,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:32:09,619 INFO L93 Difference]: Finished difference Result 420 states and 550 transitions. [2024-11-28 04:32:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:32:09,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-28 04:32:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:32:09,623 INFO L225 Difference]: With dead ends: 420 [2024-11-28 04:32:09,623 INFO L226 Difference]: Without dead ends: 373 [2024-11-28 04:32:09,624 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:32:09,625 INFO L435 NwaCegarLoop]: 103 mSDtfsCounter, 26 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:32:09,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 277 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:32:09,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2024-11-28 04:32:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2024-11-28 04:32:09,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 325 states have (on average 1.2061538461538461) internal successors, (392), 330 states have internal predecessors, (392), 38 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (46), 42 states have call predecessors, (46), 36 states have call successors, (46) [2024-11-28 04:32:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 476 transitions. [2024-11-28 04:32:09,669 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 476 transitions. Word has length 50 [2024-11-28 04:32:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:32:09,670 INFO L471 AbstractCegarLoop]: Abstraction has 373 states and 476 transitions. [2024-11-28 04:32:09,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:32:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 476 transitions. [2024-11-28 04:32:09,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 04:32:09,672 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:32:09,672 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:09,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 04:32:09,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:09,873 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:32:09,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:09,873 INFO L85 PathProgramCache]: Analyzing trace with hash 722385153, now seen corresponding path program 1 times [2024-11-28 04:32:09,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:32:09,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958736488] [2024-11-28 04:32:09,874 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:32:09,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:09,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:09,876 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:09,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 04:32:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:32:09,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:32:09,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:32:11,090 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:32:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:32:12,154 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:32:12,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958736488] [2024-11-28 04:32:12,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958736488] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:32:12,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:32:12,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2024-11-28 04:32:12,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215764032] [2024-11-28 04:32:12,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:32:12,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:32:12,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:32:12,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:32:12,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:32:12,157 INFO L87 Difference]: Start difference. First operand 373 states and 476 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:32:13,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:32:13,342 INFO L93 Difference]: Finished difference Result 401 states and 509 transitions. [2024-11-28 04:32:13,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:32:13,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2024-11-28 04:32:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:32:13,345 INFO L225 Difference]: With dead ends: 401 [2024-11-28 04:32:13,345 INFO L226 Difference]: Without dead ends: 365 [2024-11-28 04:32:13,345 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:32:13,346 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 20 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:32:13,347 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 569 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 04:32:13,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2024-11-28 04:32:13,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 353. [2024-11-28 04:32:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 305 states have (on average 1.2098360655737705) internal successors, (369), 311 states have internal predecessors, (369), 38 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (46), 41 states have call predecessors, (46), 36 states have call successors, (46) [2024-11-28 04:32:13,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 453 transitions. [2024-11-28 04:32:13,386 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 453 transitions. Word has length 50 [2024-11-28 04:32:13,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:32:13,386 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 453 transitions. [2024-11-28 04:32:13,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:32:13,387 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 453 transitions. [2024-11-28 04:32:13,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 04:32:13,388 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:32:13,389 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:13,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-28 04:32:13,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:13,589 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:32:13,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:13,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1721726817, now seen corresponding path program 1 times [2024-11-28 04:32:13,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:32:13,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417637918] [2024-11-28 04:32:13,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:32:13,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:13,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:13,593 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:13,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 04:32:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:32:13,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:32:13,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:32:13,855 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:32:13,855 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:32:13,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417637918] [2024-11-28 04:32:13,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417637918] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:32:13,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:32:13,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:32:13,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181612030] [2024-11-28 04:32:13,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:32:13,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:32:13,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:32:13,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:32:13,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:32:13,857 INFO L87 Difference]: Start difference. First operand 353 states and 453 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:32:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:32:13,988 INFO L93 Difference]: Finished difference Result 362 states and 461 transitions. [2024-11-28 04:32:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:32:13,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-28 04:32:13,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:32:13,992 INFO L225 Difference]: With dead ends: 362 [2024-11-28 04:32:13,992 INFO L226 Difference]: Without dead ends: 323 [2024-11-28 04:32:13,993 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:32:13,993 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 0 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:32:13,994 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 276 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:32:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-28 04:32:14,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 292. [2024-11-28 04:32:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 253 states have (on average 1.209486166007905) internal successors, (306), 258 states have internal predecessors, (306), 29 states have call successors, (29), 6 states have call predecessors, (29), 9 states have return successors, (34), 31 states have call predecessors, (34), 27 states have call successors, (34) [2024-11-28 04:32:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 369 transitions. [2024-11-28 04:32:14,031 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 369 transitions. Word has length 52 [2024-11-28 04:32:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:32:14,031 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 369 transitions. [2024-11-28 04:32:14,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:32:14,031 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 369 transitions. [2024-11-28 04:32:14,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 04:32:14,033 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:32:14,033 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:14,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 04:32:14,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:14,234 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:32:14,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:14,235 INFO L85 PathProgramCache]: Analyzing trace with hash -66283809, now seen corresponding path program 1 times [2024-11-28 04:32:14,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:32:14,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040588656] [2024-11-28 04:32:14,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:32:14,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:14,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:14,239 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:14,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 04:32:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:32:14,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:32:14,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:32:16,439 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:32:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:32:17,781 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:32:17,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040588656] [2024-11-28 04:32:17,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040588656] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:32:17,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:32:17,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-28 04:32:17,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778801097] [2024-11-28 04:32:17,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:32:17,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:32:17,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:32:17,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:32:17,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:32:17,783 INFO L87 Difference]: Start difference. First operand 292 states and 369 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:32:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:32:19,589 INFO L93 Difference]: Finished difference Result 363 states and 458 transitions. [2024-11-28 04:32:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:32:19,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-28 04:32:19,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:32:19,593 INFO L225 Difference]: With dead ends: 363 [2024-11-28 04:32:19,593 INFO L226 Difference]: Without dead ends: 308 [2024-11-28 04:32:19,594 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:32:19,595 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 24 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:32:19,595 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 338 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 04:32:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-28 04:32:19,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 284. [2024-11-28 04:32:19,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 244 states have (on average 1.2172131147540983) internal successors, (297), 248 states have internal predecessors, (297), 31 states have call successors, (31), 6 states have call predecessors, (31), 8 states have return successors, (32), 32 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-28 04:32:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 360 transitions. [2024-11-28 04:32:19,623 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 360 transitions. Word has length 52 [2024-11-28 04:32:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:32:19,624 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 360 transitions. [2024-11-28 04:32:19,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:32:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 360 transitions. [2024-11-28 04:32:19,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 04:32:19,625 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:32:19,625 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:19,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 04:32:19,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:19,830 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:32:19,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:19,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2031048038, now seen corresponding path program 1 times [2024-11-28 04:32:19,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:32:19,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292811373] [2024-11-28 04:32:19,830 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:32:19,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:19,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:19,832 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:19,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 04:32:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:32:19,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 04:32:19,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:32:22,633 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:32:22,633 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:32:22,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292811373] [2024-11-28 04:32:22,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292811373] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:32:22,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:32:22,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-28 04:32:22,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570571057] [2024-11-28 04:32:22,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:32:22,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:32:22,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:32:22,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:32:22,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:32:22,635 INFO L87 Difference]: Start difference. First operand 284 states and 360 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:32:26,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:32:26,846 INFO L93 Difference]: Finished difference Result 364 states and 461 transitions. [2024-11-28 04:32:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:32:26,847 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2024-11-28 04:32:26,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:32:26,848 INFO L225 Difference]: With dead ends: 364 [2024-11-28 04:32:26,848 INFO L226 Difference]: Without dead ends: 325 [2024-11-28 04:32:26,849 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:32:26,849 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 84 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:32:26,849 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1061 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-28 04:32:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-11-28 04:32:26,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 284. [2024-11-28 04:32:26,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 244 states have (on average 1.209016393442623) internal successors, (295), 248 states have internal predecessors, (295), 31 states have call successors, (31), 6 states have call predecessors, (31), 8 states have return successors, (32), 32 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-28 04:32:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 358 transitions. [2024-11-28 04:32:26,877 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 358 transitions. Word has length 53 [2024-11-28 04:32:26,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:32:26,877 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 358 transitions. [2024-11-28 04:32:26,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:32:26,878 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 358 transitions. [2024-11-28 04:32:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 04:32:26,879 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:32:26,879 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:26,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 04:32:27,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:27,080 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:32:27,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:27,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1888832162, now seen corresponding path program 1 times [2024-11-28 04:32:27,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:32:27,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145433018] [2024-11-28 04:32:27,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:32:27,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:27,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:27,085 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:27,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 04:32:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:32:27,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:32:27,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:32:29,359 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:32:31,640 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:32:31,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145433018] [2024-11-28 04:32:31,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145433018] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:32:31,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [227591782] [2024-11-28 04:32:31,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:32:31,641 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:32:31,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:32:31,643 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:32:31,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2024-11-28 04:32:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:32:31,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:32:31,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:32:32,852 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:32:35,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [227591782] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:32:35,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:32:35,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2024-11-28 04:32:35,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589650490] [2024-11-28 04:32:35,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:32:35,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:32:35,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:32:35,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:32:35,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:32:35,012 INFO L87 Difference]: Start difference. First operand 284 states and 358 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:32:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:32:39,789 INFO L93 Difference]: Finished difference Result 359 states and 456 transitions. [2024-11-28 04:32:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:32:39,790 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2024-11-28 04:32:39,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:32:39,792 INFO L225 Difference]: With dead ends: 359 [2024-11-28 04:32:39,792 INFO L226 Difference]: Without dead ends: 325 [2024-11-28 04:32:39,793 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:32:39,795 INFO L435 NwaCegarLoop]: 111 mSDtfsCounter, 44 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:32:39,796 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1012 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-28 04:32:39,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-11-28 04:32:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 284. [2024-11-28 04:32:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 244 states have (on average 1.2049180327868851) internal successors, (294), 248 states have internal predecessors, (294), 31 states have call successors, (31), 6 states have call predecessors, (31), 8 states have return successors, (32), 32 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-28 04:32:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 357 transitions. [2024-11-28 04:32:39,829 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 357 transitions. Word has length 53 [2024-11-28 04:32:39,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:32:39,829 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 357 transitions. [2024-11-28 04:32:39,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:32:39,830 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 357 transitions. [2024-11-28 04:32:39,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 04:32:39,831 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:32:39,831 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:39,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2024-11-28 04:32:40,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-28 04:32:40,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:40,232 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:32:40,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:40,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1881328668, now seen corresponding path program 1 times [2024-11-28 04:32:40,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:32:40,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765326720] [2024-11-28 04:32:40,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:32:40,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:40,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:40,235 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:40,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 04:32:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:32:40,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 04:32:40,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:32:42,997 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:32:42,997 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:32:42,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765326720] [2024-11-28 04:32:42,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765326720] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:32:42,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:32:42,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-28 04:32:42,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409102351] [2024-11-28 04:32:42,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:32:42,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:32:42,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:32:42,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:32:43,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:32:43,000 INFO L87 Difference]: Start difference. First operand 284 states and 357 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:32:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:32:48,158 INFO L93 Difference]: Finished difference Result 349 states and 437 transitions. [2024-11-28 04:32:48,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:32:48,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2024-11-28 04:32:48,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:32:48,161 INFO L225 Difference]: With dead ends: 349 [2024-11-28 04:32:48,161 INFO L226 Difference]: Without dead ends: 301 [2024-11-28 04:32:48,162 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:32:48,163 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 52 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:32:48,163 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 813 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-28 04:32:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-11-28 04:32:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 284. [2024-11-28 04:32:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 244 states have (on average 1.1967213114754098) internal successors, (292), 248 states have internal predecessors, (292), 31 states have call successors, (31), 6 states have call predecessors, (31), 8 states have return successors, (32), 32 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-28 04:32:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 355 transitions. [2024-11-28 04:32:48,197 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 355 transitions. Word has length 53 [2024-11-28 04:32:48,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:32:48,198 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 355 transitions. [2024-11-28 04:32:48,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:32:48,198 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 355 transitions. [2024-11-28 04:32:48,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 04:32:48,199 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:32:48,199 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:48,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 04:32:48,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:48,400 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:32:48,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:48,401 INFO L85 PathProgramCache]: Analyzing trace with hash -2023544544, now seen corresponding path program 1 times [2024-11-28 04:32:48,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:32:48,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668325565] [2024-11-28 04:32:48,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:32:48,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:48,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:48,403 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:48,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 04:32:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:32:48,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:32:48,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:32:51,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:32:53,057 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:32:53,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668325565] [2024-11-28 04:32:53,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668325565] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:32:53,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1151019870] [2024-11-28 04:32:53,058 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:32:53,058 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:32:53,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:32:53,060 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:32:53,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2024-11-28 04:32:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:32:53,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:32:53,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:32:53,855 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:32:53,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1151019870] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:32:53,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:32:53,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2024-11-28 04:32:53,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809423245] [2024-11-28 04:32:53,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:32:53,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:32:53,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:32:53,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:32:53,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:32:53,857 INFO L87 Difference]: Start difference. First operand 284 states and 355 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:32:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:32:55,683 INFO L93 Difference]: Finished difference Result 302 states and 374 transitions. [2024-11-28 04:32:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:32:55,684 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2024-11-28 04:32:55,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:32:55,687 INFO L225 Difference]: With dead ends: 302 [2024-11-28 04:32:55,687 INFO L226 Difference]: Without dead ends: 300 [2024-11-28 04:32:55,687 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:32:55,688 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 10 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:32:55,688 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 335 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 04:32:55,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-11-28 04:32:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 290. [2024-11-28 04:32:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 247 states have (on average 1.194331983805668) internal successors, (295), 253 states have internal predecessors, (295), 33 states have call successors, (33), 7 states have call predecessors, (33), 9 states have return successors, (34), 32 states have call predecessors, (34), 31 states have call successors, (34) [2024-11-28 04:32:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 362 transitions. [2024-11-28 04:32:55,721 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 362 transitions. Word has length 53 [2024-11-28 04:32:55,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:32:55,721 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 362 transitions. [2024-11-28 04:32:55,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:32:55,721 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 362 transitions. [2024-11-28 04:32:55,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 04:32:55,723 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:32:55,723 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:55,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2024-11-28 04:32:55,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-28 04:32:56,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:56,124 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:32:56,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:56,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1777301099, now seen corresponding path program 1 times [2024-11-28 04:32:56,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:32:56,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145953534] [2024-11-28 04:32:56,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:32:56,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:56,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:56,130 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:56,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 04:32:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:32:56,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:32:56,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:32:57,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:32:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:32:59,215 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:32:59,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145953534] [2024-11-28 04:32:59,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145953534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:32:59,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:32:59,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-28 04:32:59,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273146523] [2024-11-28 04:32:59,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:32:59,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:32:59,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:32:59,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:32:59,217 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:32:59,218 INFO L87 Difference]: Start difference. First operand 290 states and 362 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:33:01,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:33:01,643 INFO L93 Difference]: Finished difference Result 353 states and 441 transitions. [2024-11-28 04:33:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:33:01,644 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2024-11-28 04:33:01,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:33:01,646 INFO L225 Difference]: With dead ends: 353 [2024-11-28 04:33:01,646 INFO L226 Difference]: Without dead ends: 299 [2024-11-28 04:33:01,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:33:01,647 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 34 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:33:01,647 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1112 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-28 04:33:01,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-11-28 04:33:01,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 275. [2024-11-28 04:33:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 234 states have (on average 1.1794871794871795) internal successors, (276), 238 states have internal predecessors, (276), 31 states have call successors, (31), 7 states have call predecessors, (31), 9 states have return successors, (32), 30 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-28 04:33:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 339 transitions. [2024-11-28 04:33:01,679 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 339 transitions. Word has length 54 [2024-11-28 04:33:01,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:33:01,679 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 339 transitions. [2024-11-28 04:33:01,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:33:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 339 transitions. [2024-11-28 04:33:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 04:33:01,681 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:33:01,681 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:33:01,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-28 04:33:01,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:33:01,882 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:33:01,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:33:01,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1493072599, now seen corresponding path program 1 times [2024-11-28 04:33:01,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:33:01,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052979268] [2024-11-28 04:33:01,883 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:33:01,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:33:01,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:33:01,885 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:33:01,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 04:33:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:33:01,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:33:01,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:33:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:33:03,264 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:33:03,264 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:33:03,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052979268] [2024-11-28 04:33:03,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052979268] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:33:03,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:33:03,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 04:33:03,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281190773] [2024-11-28 04:33:03,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:33:03,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:33:03,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:33:03,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:33:03,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:33:03,266 INFO L87 Difference]: Start difference. First operand 275 states and 339 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:33:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:33:05,446 INFO L93 Difference]: Finished difference Result 303 states and 368 transitions. [2024-11-28 04:33:05,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:33:05,447 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-11-28 04:33:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:33:05,448 INFO L225 Difference]: With dead ends: 303 [2024-11-28 04:33:05,449 INFO L226 Difference]: Without dead ends: 240 [2024-11-28 04:33:05,449 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:33:05,449 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 36 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:33:05,450 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 639 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 04:33:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-11-28 04:33:05,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2024-11-28 04:33:05,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 191 states have (on average 1.1675392670157068) internal successors, (223), 195 states have internal predecessors, (223), 23 states have call successors, (23), 7 states have call predecessors, (23), 9 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2024-11-28 04:33:05,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 270 transitions. [2024-11-28 04:33:05,473 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 270 transitions. Word has length 54 [2024-11-28 04:33:05,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:33:05,474 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 270 transitions. [2024-11-28 04:33:05,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:33:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 270 transitions. [2024-11-28 04:33:05,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 04:33:05,477 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:33:05,477 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:33:05,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-28 04:33:05,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:33:05,678 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:33:05,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:33:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1379347739, now seen corresponding path program 1 times [2024-11-28 04:33:05,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:33:05,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744488254] [2024-11-28 04:33:05,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:33:05,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:33:05,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:33:05,681 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:33:05,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 04:33:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:33:05,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:33:05,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:33:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:33:17,338 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:33:19,711 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:33:19,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744488254] [2024-11-28 04:33:19,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744488254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:33:19,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1628052763] [2024-11-28 04:33:19,712 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:33:19,712 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:33:19,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:33:19,714 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:33:19,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2024-11-28 04:33:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:33:19,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:33:19,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:33:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:33:32,840 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:33:32,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1628052763] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:33:32,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:33:32,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 12 [2024-11-28 04:33:32,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165922659] [2024-11-28 04:33:32,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:33:32,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:33:32,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:33:32,842 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:33:32,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=236, Unknown=4, NotChecked=0, Total=306 [2024-11-28 04:33:32,842 INFO L87 Difference]: Start difference. First operand 224 states and 270 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:33:36,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:33:40,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:33:44,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:33:48,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:33:53,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:33:54,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:33:58,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:34:02,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:34:07,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:34:10,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:34:10,314 INFO L93 Difference]: Finished difference Result 234 states and 279 transitions. [2024-11-28 04:34:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:34:10,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-11-28 04:34:10,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:34:10,316 INFO L225 Difference]: With dead ends: 234 [2024-11-28 04:34:10,316 INFO L226 Difference]: Without dead ends: 232 [2024-11-28 04:34:10,317 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=73, Invalid=265, Unknown=4, NotChecked=0, Total=342 [2024-11-28 04:34:10,317 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 7 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:34:10,318 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 562 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 8 Unknown, 0 Unchecked, 37.3s Time] [2024-11-28 04:34:10,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-28 04:34:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 222. [2024-11-28 04:34:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 191 states have (on average 1.1675392670157068) internal successors, (223), 193 states have internal predecessors, (223), 21 states have call successors, (21), 7 states have call predecessors, (21), 9 states have return successors, (22), 22 states have call predecessors, (22), 19 states have call successors, (22) [2024-11-28 04:34:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 266 transitions. [2024-11-28 04:34:10,340 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 266 transitions. Word has length 54 [2024-11-28 04:34:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:34:10,340 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 266 transitions. [2024-11-28 04:34:10,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:34:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 266 transitions. [2024-11-28 04:34:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 04:34:10,341 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:34:10,341 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:34:10,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2024-11-28 04:34:10,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-28 04:34:10,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:10,742 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:34:10,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:34:10,742 INFO L85 PathProgramCache]: Analyzing trace with hash -324137263, now seen corresponding path program 1 times [2024-11-28 04:34:10,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:34:10,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043649999] [2024-11-28 04:34:10,742 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:34:10,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:10,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:34:10,745 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:34:10,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 04:34:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:34:10,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:34:10,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:34:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 04:34:11,294 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:34:11,294 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:34:11,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043649999] [2024-11-28 04:34:11,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043649999] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:34:11,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:34:11,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:34:11,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163163408] [2024-11-28 04:34:11,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:34:11,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:34:11,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:34:11,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:34:11,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:34:11,296 INFO L87 Difference]: Start difference. First operand 222 states and 266 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:34:11,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:34:11,879 INFO L93 Difference]: Finished difference Result 234 states and 278 transitions. [2024-11-28 04:34:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:34:11,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2024-11-28 04:34:11,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:34:11,881 INFO L225 Difference]: With dead ends: 234 [2024-11-28 04:34:11,881 INFO L226 Difference]: Without dead ends: 232 [2024-11-28 04:34:11,882 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:34:11,882 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 8 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:34:11,882 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 444 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:34:11,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-28 04:34:11,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2024-11-28 04:34:11,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 195 states have (on average 1.1641025641025642) internal successors, (227), 198 states have internal predecessors, (227), 22 states have call successors, (22), 8 states have call predecessors, (22), 10 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) [2024-11-28 04:34:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 272 transitions. [2024-11-28 04:34:11,902 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 272 transitions. Word has length 59 [2024-11-28 04:34:11,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:34:11,902 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 272 transitions. [2024-11-28 04:34:11,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:34:11,902 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 272 transitions. [2024-11-28 04:34:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 04:34:11,903 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:34:11,903 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:34:11,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-28 04:34:12,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:12,104 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:34:12,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:34:12,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1721027925, now seen corresponding path program 1 times [2024-11-28 04:34:12,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:34:12,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923157790] [2024-11-28 04:34:12,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:34:12,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:12,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:34:12,107 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:34:12,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 04:34:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:34:12,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:34:12,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:34:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 04:34:12,695 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:34:12,696 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:34:12,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923157790] [2024-11-28 04:34:12,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923157790] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:34:12,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:34:12,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:34:12,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792758104] [2024-11-28 04:34:12,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:34:12,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:34:12,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:34:12,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:34:12,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:34:12,697 INFO L87 Difference]: Start difference. First operand 228 states and 272 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:34:13,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:34:13,174 INFO L93 Difference]: Finished difference Result 249 states and 293 transitions. [2024-11-28 04:34:13,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:34:13,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2024-11-28 04:34:13,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:34:13,177 INFO L225 Difference]: With dead ends: 249 [2024-11-28 04:34:13,177 INFO L226 Difference]: Without dead ends: 247 [2024-11-28 04:34:13,177 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:34:13,178 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 19 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:34:13,178 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 492 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:34:13,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-28 04:34:13,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 232. [2024-11-28 04:34:13,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 198 states have (on average 1.1616161616161615) internal successors, (230), 201 states have internal predecessors, (230), 22 states have call successors, (22), 9 states have call predecessors, (22), 11 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) [2024-11-28 04:34:13,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 275 transitions. [2024-11-28 04:34:13,212 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 275 transitions. Word has length 59 [2024-11-28 04:34:13,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:34:13,212 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 275 transitions. [2024-11-28 04:34:13,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:34:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 275 transitions. [2024-11-28 04:34:13,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 04:34:13,214 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:34:13,214 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:34:13,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-28 04:34:13,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:13,419 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:34:13,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:34:13,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1001210711, now seen corresponding path program 1 times [2024-11-28 04:34:13,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:34:13,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303150687] [2024-11-28 04:34:13,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:34:13,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:34:13,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:34:13,422 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:34:13,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bf6ac7-b178-421b-92b5-0e4e82a59a86/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 04:34:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:34:13,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 04:34:13,517 INFO L279 TraceCheckSpWp]: Computing forward predicates...